Shroom Tech Sport (Onnit) Review 2026: Worth the Price?
Read before you buy. — Mostly Legit
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"Ashwagandha promotes muscle power and VO2 max"
Small trials show modest VO2 max gains, but only at standardized doses of 300-600mg, which isn't disclosed here.
Examine.com ashwagandha summary -
"Cordyceps 'harnesses the power' to boost endurance"
Randomized trials on cordyceps and VO2 max show mixed results, with several finding no real performance boost.
PubMed: cordyceps militaris exercise performance RCTs -
"No dosage amounts listed for any active ingredient"
Without milligram amounts, you can't tell if doses match the amounts used in studies showing benefits.
Internal: dose transparency check -
"Green tea extract 'shown to support endurance'"
Green tea's endurance benefit in most studies comes from caffeine, and this version is decaffeinated.
Internal: mechanism analysis
Consumer advice
Look up the actual supplement facts panel (not shown in this listing) before buying - it should list mg amounts per ingredient. If it's a proprietary blend with only a total weight, assume the pricier ingredients (rhodiola, cordyceps) are underdosed relative to the cheap fillers. If you just want cordyceps or rhodiola, standalone extracts with labeled doses cost much less per serving.
Claims vs Evidence
MODEST4 claims assessed. These grades assess the marketing claims, not the whole product. See each explanation for the evidence and its limits.
"Assists aerobic performance"
Partial
Some human trials show modest VO2 max gains, others show none
Based on: Cordyceps Sinensis, Rhodiola Extract
Source: PubMed: Cordyceps militaris exercise performance reviews
"Supports exercise volume"
Partial
Rhodiola shows modest fatigue-delay effects in some studies
Based on: Rhodiola Extract, Ashwagandha Root Extract
Source: Examine.com rhodiola summary
"Helps the body with cellular energy"
Stretch
B12 only helps if deficient; most people aren't
Based on: Vitamin B12, Cordyceps Sinensis
Source: Internal: nutrient deficiency logic
"Promotes muscle power and VO2 max (ashwagandha)"
Partial
Small trials show modest VO2 max gains at 500-600mg doses
Based on: Ashwagandha Root Extract
Source: PubMed: ashwagandha athletic performance trials
3 partial · 1 stretch
Ingredients
Based on peer-reviewed research from PubMed and Examine.com
Why the chain breaks for this product
Most ingredients below have real research behind them. The problem isn't the ingredients — it's the doses. 6 of 6 are not disclosed on the label, so the product can claim the benefits without delivering the chain that gets you there.
Cordyceps Sinensis
Medicinal mushroom used in traditional Chinese medicine; preliminary evidence for energy and immune support.
Research-backed dose: 1-3g/day in most human trials showing modest effects
In this product: Dose not disclosed
Ashwagandha Root Extract
Adaptogenic herb. Commonly used to reduce stress, lower cortisol, and support sleep and recovery.
Research-backed dose: 300-600 mg daily (root extract, standardized to ≥5% withanolides)
In this product: Dose not disclosed
Rhodiola Extract
Adaptogenic herb shown to reduce stress, fatigue, and anxiety, with some benefits for athletic performance.
Research-backed dose: 120-1000 mg daily based on study doses
In this product: Dose not disclosed
Essential B vitamin that treats deficiency-related anemia and supports nerve and metabolic health.
Research-backed dose: 2.4mcg RDA; higher doses don't add benefit unless deficient
In this product: Dose not disclosed
Green Tea Leaf Extract
Antioxidant-rich plant extract. Best evidence for boosting fat burning during exercise and supporting oral health.
Research-backed dose: 300-500mg EGCG typically used in endurance studies
In this product: Dose not disclosed
Essential B vitamin that treats deficiency-related anemia and supports nerve and metabolic health.
Safety & side effects
What NIH says about the ingredients in this product. This describes the ingredients, not tests of this product, and it is not medical advice. Ask a doctor or pharmacist first if you take medication, are pregnant or nursing, or have a health condition.
Ashwagandha
ODS says ashwagandha appears well tolerated for up to about 3 months, but long-term safety isn't known. It names liver and thyroid concerns, possible medication interactions, and groups who should avoid it, including pregnant women.
Possible side effects
- Stomach upset, loose stools, nausea, and drowsiness are listed as common side effects, and ODS calls them mild.
- NCCIH says some people may get drowsiness, stomach upset, diarrhea, and vomiting.
- Increased heart rate variability has been reported.
Serious risks
- There are a few reports of more serious side effects, including effects on liver function.
- In reported liver injury cases, people's conditions improved over time after they stopped the supplement, and some also received medical treatment.
- NCCIH describes liver injury cases linked to ashwagandha supplements and calls them rare.
- Three case reports describe thyrotoxicosis in women taking ashwagandha extract.
- In all three thyrotoxicosis cases, stopping ashwagandha resolved the symptoms.
Avoid or ask a doctor first if
- Some experts advise pregnant women not to use ashwagandha, because some reports suggest it could cause spontaneous abortion.
- NCCIH says to avoid ashwagandha during pregnancy and not to use it while breastfeeding.
- NCCIH does not recommend it before surgery or for people with autoimmune or thyroid disorders.
- People with hormone-sensitive prostate cancer should avoid it because it may raise testosterone.
Medication interactions
- Ashwagandha might interact with thyroid hormone medications.
- It might also interact with antidiabetes drugs, antihypertensives, immunosuppressants, and sedatives.
- NCCIH lists diabetes, high blood pressure, immunosuppressant, sedative, anti-seizure, and thyroid hormone medications.
Source: NIH Office of Dietary Supplements, Ashwagandha: Fact Sheet for Health Professionals, NIH NCCIH, Ashwagandha: Usefulness and Safety
Rhodiola
NCCIH says rhodiola is possibly safe for up to 12 weeks. Side effects may include dizziness, headache, insomnia, and dry mouth or extra saliva. Little is known about use in pregnancy or breastfeeding, and a losartan interaction has been reported.
Possible side effects
- Side effects may include dizziness, headache, insomnia, and either dry mouth or excessive saliva production.
- Rhodiola is possibly safe for up to 12 weeks.
Avoid or ask a doctor first if
- Little is known about safety during pregnancy or breastfeeding.
- People who have or may have depression, or have a family member who may, should consult a health care provider.
Medication interactions
- Interactions between rhodiola and losartan, a blood pressure drug, have been reported.
- People taking any medicine should talk with a health care provider before using an herbal product, since some herbs and medicines interact in harmful ways.
Vitamin B12
The source says vitamin B12 has no tolerable upper intake level because of its low potential for toxicity, and it is generally considered safe even at large doses. Some medications can affect B12 levels, and supplements may interact with certain medications.
Serious risks
- The Food and Nutrition Board set no upper limit for B12 because its potential for toxicity is low.
Avoid or ask a doctor first if
- People who regularly take certain medications are told to talk with their health care providers about their B12 status.
Medication interactions
- B12 supplements may interact with some medications. Gastric acid inhibitors and metformin may affect B12 levels.
- Several types of medications might adversely affect B12 levels.
Source: NIH Office of Dietary Supplements, Vitamin B12: Fact Sheet for Health Professionals
Price & Value
ModerateShroom Tech Sport (Onnit)
$55.89
Standalone cordyceps + rhodiola + ashwagandha supplements (e.g., Nutricost or NOW Foods brands)
~$15-20/month combined for equivalent labeled-dose ingredients
What you're actually paying for
This is a multi-ingredient blend at $1.86/day one-time, $1.58/day subscribed a serving. Comparable options: Standalone cordyceps extract, ashwagandha (like KSM-66), and rhodiola supplements sold separately for a fraction of the price.
Worth paying for
- Assists aerobic performance
- Supports exercise volume
- Promotes muscle power and VO2 max (ashwagandha)
What's marketing
- Helps the body with cellular energy
- Cordyceps 'harnesses the power' to boost endurance
- No dosage amounts listed for any active ingredient
- Green tea extract 'shown to support endurance'
Research sources: PubMed · Examine.com
Analyzed product: https://onnit.com/products/shroom-tech-sport-84-ct
Analysis generated: 2026-09-13 · Engine v1.0.0
Frequently Asked Questions
Is Shroom Tech Sport (Onnit) worth the money?
Shroom Tech Sport (Onnit) at $55.89 appears to offer reasonable value based on its ingredient quality and dosing. Shroom Tech Sport uses ingredients with some legitimate research behind them (rhodiola, ashwagandha, cordyceps) for endurance support, and the marketing claims are appropriately hedged with "supports" and "helps" language rather than miracle promises. The big problem is the complete absence of dosage information on the product page - you have no way to know if you're getting therapeu
Is Shroom Tech Sport (Onnit) a scam?
Shroom Tech Sport (Onnit) does not appear to be a scam. Our analysis found the claims are generally supported by the ingredients.
What are the ingredients in Shroom Tech Sport (Onnit)?
Shroom Tech Sport (Onnit) contains 6 ingredients including Cordyceps Sinensis, Ashwagandha Root Extract, Rhodiola Extract, Vitamin B12 as Methylcobalamin, Green Tea Leaf Extract.
Does Shroom Tech Sport (Onnit) actually work?
Yes, Shroom Tech Sport (Onnit) can work for its intended purpose. 0 of 4 claims are fully supported. 3 are partially supported.
Are there cheaper alternatives to Shroom Tech Sport (Onnit)?
Yes, Standalone cordyceps + rhodiola + ashwagandha supplements (e.g., Nutricost or NOW Foods brands) at ~$15-20/month combined for equivalent labeled-dose ingredients offers similar benefits at a better price point. Many key ingredients in Shroom Tech Sport (Onnit) are available separately for less.
Does Shroom Tech Sport (Onnit) have side effects?
NIH summaries of the ingredients in Shroom Tech Sport (Onnit) note these possible effects. Ashwagandha: Stomach upset, loose stools, nausea, and drowsiness are listed as common side effects, and ODS calls them mild. Rhodiola: Side effects may include dizziness, headache, insomnia, and either dry mouth or excessive saliva production. Vitamin B12: The Food and Nutrition Board set no upper limit for B12 because its potential for toxicity is low. This describes the ingredients, not tests of this pro